Manufacturing method for a reinforced separator
AssigneeAgfa-Gevaert
InventorsWillem Mues, Hanne Verwaest, Cristina Tudisco
Life of this patent
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Abstract
A method of preparing a reinforced separator comprising the steps of:—providing a porous support (6) on a pre-wetted casting drum (23);—applying a dope solution (3) including a polymer resin and hydrophilic inorganic particles on a side of the porous support other than the side of the porous support in contact with the pre-wetted casting drum;—performing phase inversion (9, 1) of the applied polymer solution thereby obtaining a reinforced separator; and—removing the reinforced separator (7) from the casting drum; wherein the casting drum is pre-wetted with a non-solvent for the polymer resin.
Claims13
A method of preparing a reinforced separator comprising the steps of:
- providing a porous support on a pre-wetted casting drum;
- applying a dope solution including a polymer resin and hydrophilic inorganic particles on a side of the porous support other than a side of the porous support in contact with the pre-wetted casting drum;
- performing phase inversion of the applied dope solution thereby obtaining a reinforced separator;
- and
- removing the reinforced separator from the casting drum,
- wherein the casting drum is pre-wetted with a non-solvent for the polymer resin, wherein the pre-wetted casting drum is obtained by applying a layer of non-solvent on the casting drum, wherein the layer of non-solvent on the casting drum has a thickness that is lower than the thickness of the porous support, and wherein the pre-wetted casting drum contains less than 50 g of non-solvent per m2 surface area of the casting drum.
Dependencies are inferred from the claim text.